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Paleoproterozoic gold events in the southern West African Craton: review and synopsis

by Aillères Laurent , Masurel Quentin , André-Mayer Anne-Sylvie , Begg, Graham , Miller, John , Jessell, Mark , Allibone, Andrew , Wane Ousmane , Baratoux Lenka , Eglinger Aurélien , Thébaud Nicolas , Hayman, Patrick , Kouamélan Alain , Perrouty Stephane , McFarlane, Helen , Vanderhaeghe Olivier , Asinne, Tshibubudze , Fougerouse Denis , Parra-Avila, Luis , Salvi Stefano , Amponsah Prince Ofori

in Accretion / Cratons / Deformation / Deposition / Deposits / Domains / Geochronology / Gold / Isotopes / Juveniles / Metamorphism / Mineralization / Orogeny / Plate tectonics / Slip / Synopsis / Tectonics / Volcanic activity / Volcanism

2022

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Paleoproterozoic gold events in the southern West African Craton: review and synopsis

2022

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2022

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Journal Article

Paleoproterozoic gold events in the southern West African Craton: review and synopsis

Aillères Laurent,

Masurel Quentin,

André-Mayer Anne-Sylvie,

Begg, Graham,

Miller, John,

Jessell, Mark,

Allibone, Andrew,

Wane Ousmane,

Baratoux Lenka,

Eglinger Aurélien,

Thébaud Nicolas,

Hayman, Patrick,

Kouamélan Alain,

Perrouty Stephane,

McFarlane, Helen,

Vanderhaeghe Olivier,

Asinne, Tshibubudze,

Fougerouse Denis,

Parra-Avila, Luis,

Salvi Stefano,

Amponsah Prince Ofori

2022

Overview

The southern part of the West African Craton includes the Baoulé-Mossi Domain, the world’s premier Paleoproterozoic gold province (~10,000 metric ton gold endowment). Structural, metamorphic, and geochronological data suggest gold mineralisation occurred during three episodes that span much of the Eoeburnean and Eburnean orogenic cycles. Eoeburnean orogenic and rare skarn-hosted gold deposits formed between ca. 2200 and 2135 Ma during repeated episodes of volcanism, plutonism, and shortening, which thickened the Paleoproterozoic crust. Early Eburnean orogenic and placer gold deposits formed between ca. 2110 and 2095 Ma during inversion, metamorphism, and subsequent oblique shortening of intra-orogenic basins filled after ca. 2135 Ma. This episode of mineralisation terminated when the Baoulé-Mossi Domain docked with the Archean Kénéma-Man Domain at ca. 2095 Ma. Late Eburnean orogenic and less common intrusion-related gold deposits formed between ca. 2095 and 2060 Ma during strike-slip to oblique-slip tectonics, post-collisional high-K plutonism and crustal reworking across the western and southern Baoulé-Mossi Domain. Eoeburnean gold deposits include ca. 10 % of the gold endowment of the Baoulé-Mossi Domain, whereas the Early Eburnean and Late Eburnean deposits include ca. 50–70% and 20–40%, respectively. Here, we highlight the favourable confluence of accretion-collision tectonics, involving juvenile crust formation as well as protracted magmatic, metamorphic, and deformation histories that resulted in diachronous gold events spread over at least 100 myr throughout the Baoulé-Mossi Domain.

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Publisher

Springer Nature B.V

Subject

/ Cratons

/ Domains